制备了乙炔黑修饰电极(AB/GCE),运用交流阻抗法研究了电极表面的特性。研究了1-萘酚(α-N)和2-萘酚(β-N)在该修饰电极上的循环伏安行为,探讨了修饰剂用量、底液种类及pH、浓度和扫速对伏安行为的影响。在pH6．0的B-R缓冲液中,α-N和β-N均出现一明显的不可逆氧化峰。在60~240mV·s-1扫速范围内,二者氧化峰电流与扫速均呈线性关系,表明该电极过程是受吸附控制的不可逆过程。计算了电极过程的部分动力学参数。运用线性扫描伏安法结合半微分技术对α-N和β-N进行了同时定量测定,发现α-N和β-N的半微分氧化峰电流值与其浓度在5．00×10-5~6．50×10-4mol·L-1范围内呈良好的线性关系(rα-N=0．996；rβ-N=0．997)。α-N和β-N 的检出限(S/N=3)分别为5．04×10-7mol·L-1,6．69×10-7mol·L-1。加标回收率分别为97．20%~100．20%和95．40%~102．50%。%A new modified electrode( AB/GCE) was prepared by acetylene black and was used to determine naphthol isomers. The properties of electrode surface were characterized by Nyquist plots. Cyclic voltammetry was used to study the electrochemical behav-iors of α-N and β-N on AB/GCE. The influences of modifier dosage,type of buffer solution,pH,concentration of naphthol isomers and scan rate were discussed by Cyclic voltammetry(CV). The results indicated that there were two sensitive oxidation peaks re-spectively belong toα-N andβ-N in pH6. 0B-R buffer solution. The oxidation peak currents of bothα-N andβ-N were linearly withυ in the range of 60~240mV·s-1 ,showed that the electrode processes ofα-N andβ-N were controlled by adsorption. Some impor-tant parameters of these electrochemical processes were also determined. The linear sweep voltammetry( LSV) with semi-derviative technique was used to determine naphthol isomers quantitatively. A good linear relationship between the peak currents and concen-trations of α-N andβ-N was observed in the range of 5. 00×10-5 ~6. 50×10-4mol·L-1. The detection limit ofα-N is 5. 04×10-7mol ·L-1 and β-N is 6. 69×10-7mol·L-1(S/N=3). The spiked recoveries of the two samples were 97. 20% ~100. 20%and 95. 40% ~102. 50%,respectively.
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